<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
        <el-table :data ="roleslist" border stripe>
            <!-- 展开列 type="expend"-->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <!-- 动态绑定类名 -->
                    <el-row :class="['bdbottom','vcenter',i1===0?'bdtop':'']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightsById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                            
                        </el-col>
                        <!-- 渲染二级 三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for环 -->
                            <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightsById(scope.row,item2.id)">
                                        {{item2.authName}}
                                    </el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag  type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightsById(scope.row,item3.id)">
                                        {{item3.authName}}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                    <!-- <pre>{{scope.row}}</pre> -->
                </template>
            </el-table-column>
            <!-- 索引列 type="index"-->
            <el-table-column type="index" label="#"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                 <template slot-scope="scope">
                     <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                     <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                     <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                 </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
        title="提示"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close = "setRightDialogClose"
        >
  <el-tree :data="rightslist" ref="treeRef" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
    data() {
        return {
            // 角色列表
            roleslist:[],
            //所有权限
            rightslist:[],
            /**
             * defKeys默认选中的节点id值数组
             * 获取当前用户的权限展示在树结构
             * */
            defKeys:[],

            roleId:'',
            //设置权限的对话框显示与隐藏
            setRightDialogVisible:false,
            //树形控件的绑定对象
            treeProps:{
                children: 'children',
                label: 'authName'
            }
        }
    },

    created() {
        this.getRolesList()
    },

    methods: {


       //获取所有的角色列表
       async getRolesList(){
           const {data:res} =await this.$http.get('roles')
           if(res.meta.status!=200){
               this.$message.err('获取角色列表失败')
           }
           this.roleslist = res.data
        //    this.$message.success(res.meta.msg)
        //    console.log(this.roleslist)
       },


       //根据id删除操作
       async removeRightsById(role,id){
           //弹框提示用户是否要删除
             const confirmReult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

        if(confirmReult!='confirm'){
            return this.$message.info('取消了删除')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${id}`)

        if(res.meta.status!=200){
            return this.$message.error('删除权限失败')
        }
        /**
         * 不建议重新请求数据
         * this.getRolesList()
         * 会导致展开的数据的关闭
         */
        //重新接收权限
        role.children = res.data;
       },

      //获取所有权限
      async showSetRightDialog(role){
          this.roleId = role.id;
          const {data:res} =await this.$http.get('rights/tree')

          if(res.meta.status!=200){
              return this.$message.err('获取权限失败')
          }
          //获取的权限保存在data中
          this.rightslist = res.data

          //
          this.getLeafKeys(role,this.defKeys)
          this.setRightDialogVisible = true

        //   console.log(this.rightslist)
      },

      //通过递归函数获取角色下的所有三级权限id
      getLeafKeys(node,arr){
          /**
           * 如果节点不包括children 
           * 就是三级节点
           */
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item => {
            this.getLeafKeys(item,arr)
        });
      },

      //监听分配权限对话框关闭触发
      setRightDialogClose(){
          this.defKeys = []
      },
      //点击为角色分配权限
      async allotRights(){

          const keys=[
              ...this.$refs.treeRef.getCheckedKeys(),
              ...this.$refs.treeRef.getHalfCheckedKeys()
          ]

          const idStr = keys.join(',')
          
          const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
         if(res.meta.status!=200){
             return this.$message.err('分配权限失败！')
         }
         this.$message.success('分配权限成功')
         this.getRolesList()
         this.setRightDialogVisible = false
      }
    },
}
</script>

<style lang="less" scoped>
.el-tag{
     margin: 8px;
}
.bdtop{
    border-top: 1px #eee solid;
}
.bdbottom{
     border-bottom:1px #eee solid ;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
